本文關鍵詞：考慮橋梁幾何非線性的風-車-橋耦合振動分析，由筆耕文化傳播整理發(fā)布。

第30 卷第4 期 Vol.30 No.4 工 程 力 學 2013 年 4 月 Apr. 2013 ENGINEERING MECHANICS 122 文章編號：1000-4750 2013 04-0122-07 考慮橋梁幾何非線性的風-車-橋耦合振動分析 王少欽，夏 禾，郭薇薇，杜憲亭 北京交通大學土木建筑工程學院，北京 100044 摘 要：考慮橋梁結(jié)構的幾何非線性因素，建立了風及列車荷載作用下大跨度橋梁的振動分析模型。以某大跨度 三拱連續(xù)鋼桁梁橋為例，分析了脈動風及靜風荷載的不同作用效應，，風速、車速變化以及結(jié)構幾何非線性對橋梁 振動響應的影響。結(jié)果表明：在進行車橋耦合振動分析時要綜合考慮風荷載的動力作用；幾何非線性因素會影響 橋梁振動的極值，但不影響其變化趨勢；風速及車速變化對橋梁位移極值均有較大影響。 關鍵詞：橋梁；列車；風；幾何非線性；耦合振動 中圖分類號：U24 文獻標志碼：A doi: 10.6052/j.issn.1000-4750.2011.11.0751 COUPLING VIBRATION ANALYSIS OF WIND-TRAIN-BRIDGE SYSTEM CONSIDERING GEOMETRIC NONLINEARITY OF BRIDGE WANG Shao-qin , XIA He , GUO Wei-wei , DU Xian-ting School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China Abstract: Taking into account the geometric nonlinearity of structures, the dynamic analysis model for long-span bridges under train and wind actions is established. A long-span continuous steel trussed bridge is taken as an example to analyze the load effects of static wind and buffeting wind, the influence of wind velocity and train speed and the effect of geometric nonlinearity. The results show that the wind loads should be considered in analyzing the train and bridge system; the geometric nonlinearity affects greatly the maximum deflections of bridge, but it does not change the tendency of displacement histories; both wind velocity and train-speed have great influenc

  本文關鍵詞：考慮橋梁幾何非線性的風-車-橋耦合振動分析，由筆耕文化傳播整理發(fā)布。